Change how events are handled in Effen

sky/framework/components/material.dart

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 import '../fn.dart';
 import '../theme/shadows.dart';
 import 'dart:collection';
 import 'dart:sky' as sky;
 import 'ink_splash.dart';
 
@@ skipping 12 matching lines @@
   Style style;
   String inlineStyle;
   List<Node> children;
   int level;
 
   Material({
       Object key,
       this.style,
       this.inlineStyle,
       this.children,
-      this.level: 0 }) : super(key: key) {
-    events.listen('gesturescrollstart', _cancelSplashes);
-    events.listen('wheel', _cancelSplashes);
-    events.listen('pointerdown', _startSplash);
-  }
+      this.level: 0 }) : super(key: key);
 
   Node build() {
     List<Node> childrenIncludingSplashes = [];
 
     if (_splashes != null) {
       childrenIncludingSplashes.addAll(
           _splashes.map((s) => new InkSplash(s.onStyleChanged)));
     }
 
     if (children != null)
       childrenIncludingSplashes.addAll(children);
 
-    return new Container(
-        style: level > 0 ? style.extend(shadowStyle[level]) : style,
-        inlineStyle: inlineStyle,
-        children: childrenIncludingSplashes);
+    return new EventTarget(
+      new Container(
+          style: level > 0 ? style.extend(shadowStyle[level]) : style,
+          inlineStyle: inlineStyle,
+          children: childrenIncludingSplashes),
+      onGestureScrollStart: _cancelSplashes,
+      onWheel: _cancelSplashes,
+      onPointerDown: _startSplash
+    );
   }
 
   sky.ClientRect _getBoundingRect() => (getRoot() as sky.Element).getBoundingClientRect();
 
   void _startSplash(sky.PointerEvent event) {
     setState(() {
       if (_splashes == null) {
         _splashes = new LinkedHashSet<SplashAnimation>();
       }
 
@@ skipping 27 matching lines @@
     }
 
     setState(() {
       _splashes.remove(splash);
       if (_splashes.length == 0) {
         _splashes = null;
       }
     });
   }
 }